IL32271A - A fluorescent tube holder bracket - Google Patents

Description

A AWD HOLDER This invention relates to a new and improved tube holder fluorescent tubes are in general provided at each end thereof with a pair of pins which a re arranged to be inserted in and supported by a corresponding pair of brackets so as to make contact with suitable contacts located in the In one known of bracket there is a curved slot such that when the pair of pins is inserted therein and the tube as a whole is rotated by the pins are effectively supported by the walls of the slot and at the same time make firm electrical contact with the electrical contacts provided in the It has however been found in practice that with such brackets the tube is not firmly held and vibrations can result in the loosening and falling of the In accordance with another form of known bracket a pair of recesses are formed therein to receive the pair of pins electrical contact pieces being located at the bases of the With such an arrangement at least one of the two brackets designed to support a single tube has its recesses in a body located in the bracket and spring biased outwardly in the direction of the Whilst with this arrangement the spring biased body associated with at least one of the brackets ensures that the tube is firmly difficulty is experienced in lating the tube so as to locate the pins in the appropriate recesses and at the same time to press the spring biased body inwardly so as to allow for the introduction the pins at opposite side of the tube into the recesses of the other It is an object of the present inventio to provide a fluorescent tube bracket in which the referred to advantages are substantially reduced or According to the present invention there is provided a holder bracket for a fluorescent tube a bracket an aperture formed in the aperture walls defining the aperture and an aperture a pair of electrical contacts located on opposite portions of the ture a slotted body located in the aperture and spring biased to project outwardly the walls of the body and the aperture being formed with complementary cam surfaces so that upon rotation of body a irst position wherein its slot is aligned with the inlet into a second position wherein the aperture is delimited by the the body moves under its spring biasing from retracted position within the bracket into an extended position projecting One embodiment in accordance with the present invention will now be described by way of example and with reference to the accompanying in whic 1 a front elevation of an elongated escent tube supported by a pair of holder brackets in ance with the present 2 is a partially sectioned front elevation of the is a longitudinally sectioned side elevation of the bracket shown in 2 taken along the lines 4 is a similar view that shown in of a portion of the bracket with a slotted body thereof rotated by 5 is a cross sectional view of the bracket shown in 4 taken along the line and 6 is a perspective of the end of a escent tube and the operative portions of a bracket in ance with the As seen in 1 of the drawings an elongated fluorescent 1 as shown in two pins 2 projecting from either end thereof is mounted in a pair of bracket holders 3 which in its turn is mounted on a sealing The bracket 3 consists of a housing 5 having a rounded lower end and a flanged upper end A central internal rib extends through the housing and interrupted by a circular aperture 9 formed in the housing and defined between opposite walls 10 of the rib 8 and housing A tapering inlet aperture U is formed in the lower rounded end of the housing and communicates with the aperture As can be clearly seen in of the drawings each opposite wall 10 is formed with an inwardly tapering surface A pair of sprung contact strips 13 are fixedly held within the housing on either side of the central rib the lower contact ends of the contact strips through the aperture The upper ends of the contact strips 13 are bent outwardly and provided with screws 1 by means of which contact can be made with the supply wires A slotted body clearly in 6 of the is of substantially polygonal sectional shape and is formed with a flanged base 16 which is shaped so as to have two pairs of crests 17 two pairs of recesses A slot 19 is formed in the body the slot 19 extending from the end of the body 15 opposite its 16 to the tops of opposite crests The body 15 is located within the housing 5 with the front slotted face thereof exposed within the aperture undulating edge of the base flange 16 rides on the tapering cam surface 12 so that in one position in 2 and 3 of the where the crests 17 contact with the tapering cam surface 12 the body is substantially located within the housing whilst in a second position by with respect to the first where the recesses 18 make Contact with the tapering cam surface 12 body 15 projects out of the housing A compressio spring 20 is employed to bias the body 15 outwardly with respect to the housing As can be seen in 2 and 6 of the the lower ends of the contact strips 13 press against opposite portions the body 15 but whilst in the position shown in 2 and 6 effective contact with lower ends cannot be the body 15 is rotated by shown in 4 of the communication and contact with the strips 13 can be had through the slot In use the bracket holders 3 are located with their slotted bodies 15 in the position shwon in 2 and of the with the 19 thereof communicating with the inlet aperture In this position the ends of the escent tube each consisting of two pins is slid into the slot via the inlet aperture 11 and the tube is rotated by as a result of which the two pins make contact with the contact strips 13 and at the same time the slotted body 15 projects outwardly the influence of the biasing springs 20 thereby gripping the tube in It will be seen that with brackets of the kind described above the introduction of the tube into the brackets is rendered very simple whilst by virtue of a very simple movement of the tube electrical contact is effectively made and the tube held locked in position until when it is desired remove it a mere rotation by will free the Whilst in the arrangement described above the tube has been shown held by two each in accordance with the it will be realized that the invention is equally applicable to the situation where only one bracket is constructed in accordance with the present invention whilst the remaining bracket can b of standard need not possess a spring loaded slotted insufficientOCRQuality

Claims (2)

1. A holder bracket for a fluorescent tube comprising a bracket housing) an aperture formed in the housing, aperture walls defining the aperture and an aperture inlet, a pair of electrical contacts located on opposite portions of the aperture wall®, a slotted body located in the aperture and spring biased to project outwardly therefrom, the walls of the body and the aperture being formed with complementary cam surfaces so that upon rotation of the body from a first position wherein its slot is aligned with the inlet into a second position wherein the aperture is delimited by the contacts, the body moves under its spring biasing from a retracted position within the bracket into an extended position projecting therefrom,

2. A holder bracket for a fluorescent tube substantially as hereinbefore described by way of example and with reference to the accompanying drawings. Fo the Applicants PARfNSSS XS/rb